Rigging-screw.



Patented Dec. 25. I900.

H. S. CLEMENT &. A. S. THOMSON.

RIGGING SCREW.-

(Application filed July 25, 1900.)

3 Sheets-She6t I.

(No Model.)

(No Model.) 6

Patent'ed Dec. 25, I900.

H. S, CLEMENT &. A. S. THOMSON.

RIGGING SCREW.

(Application filed m 25, 1900.

3 Sheets-Sheet 2.

'No. 664,466. Patented Dec. 25, I900. H. s. CLEMENT & A. s. nmmsou.RIGGING SCREW.

(Application filed July 25, 1900.) No Model.) 3 Sheets-Sheet 3.

w mm m H WM w... Maw fiww UNITED STATES HUGH SPROTT CLEMENT AND PATENTOFFICE.

ALLAN STEWART THOMSON, OF GLASGOW,

SCOTLAND.

RlGGlNG-SCREW.

SPECIFICATION forming part of Letters Patent No. 664,466, dated December25, 1900.

Application filed July 25, 1900. Serial No. 24,856. (No model.)

To a. whom it may concern.-

Be it known that we, HUGH SPROTT CLEM- ENT, residing at 141 West Georgestreet, and ALLAN STEWART THoMsoN, residing at 41 New Wynd, Trongate, inthe city of Glasgow, Scotland, subjects of Her Majesty the Queen ofGreat Britain, have invented a new and useful Rigging-Screw, of whichthe following is a specification.

This invention has reference to improved means for securing the ends andregulating the tension of ropes; and it more especially relates torigging-screws for use in connection with wire-rigged ships. It is not,however, limited to this application, but may advantageously be employedin other circumstances in which wire or other rope has to be paratus.

secured and its tension adjusted.

This invention has for its objects, first, to construct apparatus whichshall serve both as a clamp to securely grip the end of a rope and as ameans for regulating the tension of the same; second, to obviate thenecessity for splicing the ends of a rope into a bight or loopencircling a portion of the apparatus, as has hitherto been usual;third, to enable the tension of the rope to be adjusted by means of asingle screw instead of by the right and left handed screw, which hasheretofore usually formed part of apparatus for this purpose, and,fourth, to so construct and arrange the apparatus that the said screwshall be normally inclosed within and protected by a nut while the ropeis in tension, the necessity for the covering of canvas usually employedto protect the screw when exposed being thereby obviated. For theattainment of these objects we employ a single-threaded screw-boltfurnished with a rotatable nut adapted to engage a clamping device whichgrips the end of the rope, the connection between the nut and clampbeing such that the former, notwithstanding such connection, may befreely turned to regulate the tension of the rope.

Apparatus in accordance with our invention is hereinafter described withreference to the accompanying drawings, in which- Figure 1 is alongitudinal section of the ap- Fig. 2 is a longitudinal elevation ofthe same in a plane at right angles to Fig.

1, and Figs. 3, 4, and 5 are detail views of portions of the apparatus.

. An elongated nut l, cylindrical in general I outlinefbutiffav 'rngasquare or polygonal central portion 2, is furnished at one end with acircular flange 3. In the nut 1 works a screwbolt 4, having at one end aring or eye 5, by means of which it is secured to any suitable point ofattachment by means of a staple, shackle, hook, or the like, and alongitudinally-split tapered sleeve, consisting of two portions 6 and 7,has its larger end 8 formed to embrace the collar 3, which turns freelytherein. This split sleeve is embraced by another conical sleeve 9,adapted to be moved lengthwise thereon by means of a nut 10, whichcoacts with a split screw 11, formed on the extremities of the portions6 and 7 of the split sleeve and acts against the enlarged or flanged endof the outer sleeve 9. The halfsleeve 7 is furnished with a pair ofprojections 12, which engage corresponding recesses 13 on thehalf-sleeve 6, these projections and recesses causing the two portions 6and 7 of the sleeve and of the screw 11 to assume a correct positionwith respect to each other. The end 14 of the rope 15 to be secured isenlarged by doubling, plaiting, or otherwise,

and this end of the rope is clamped within the portions 6 and 7 of thesplit sleeve by the outer sleeve 9 being forced thereon under the actionof the nut 10, which is preferably reinforced by a lock-nut 16.

The operation of this device is as follows: The screw 4 being secured tothe point of attachment by its eye 5 and the nut l screwed thereupon,the two halves 6 and 7 of the split clamping-sleeve are placed inposition, engaging the collar 3 and embracing the enlarged end 14 of therope. The outer sleeve 9 and nut 10 are then passed over the other endof the rope 15, and this sleeve 9 being placed over the split sleeve andforced thereupon by the nut 10 and the screw 11 the wedge-like action ofthe coned or tapered parts 6, 7, and 9 allows very considerable pressureto be applied by the said nut and screw, forcing together the twoportions of the clamping-sleeve and firmly securing the enlarged end ofthe rope within this sleeve. The free end of the rope 15 being securedto the mast or other desired point of attachment, the

length and tension of the same may be regulated by turning the nut 1 bymeans of a wrench or spanner engaging its non-circular portion 2, itscollar 3 meanwhile turning freely within the portion 8 of the innersleeve.

What we claim as our invention, and desire to secure by Letters Patent,is- I 1. Apparatus for regulating the tension of a rope and securelygripping one end thereof, comprising a screw bolt; a rotatable nutthereon, a clamping deviceadapted to engage said nut and to permit ofits rotation, and to firmly grip the end of the rope to be secured asand for the purposes hereinbefore described.

2. Apparatus for regulating the tension of a rope and securely clampingone end of the same, comprising a screw-bolt; an elongated nut .coactingtherewith provided with a non-' circular part by which it may be turned,and with a circular flange; a tapered and split clamping-sleeveembracing the enlarged end of the rope to be secured, and having itslarger end formed to engage the ,flange on the elongated nut, and itssmaller end screwed to receive a nut preferably reinforced with alock-nut; and an outer coned or tapered sleeve adapted to be forced uponthe tapered portion thereof as and for the purposes hereinbeforedescribed.

3. A rigging-screw comprising in combination a screw-bolt an elongatedrotatable nut coacting therewith provided with a non-circular part andwith a circular flange, a tapered and split sleeve engaging the saidflange, adapted to embrace the end of the rope to be secured, having atone end a screwed portion whereon is a nut and an outer tapered sleeveadapted to be forced by said nut onto the inner sleeve; asandfor-the'purposes herein before described.

HUGH SPROTT CLEMENT. [1,. s.] I ALLAN STEWART THOMSON. [L. s.]

Witnesses:

JNo. M. FADZEAN, WM. EVANS.

